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Earth's Statistics
| lowest-highest |
Name |
altitude in km. and mi. |
features |
| 1 |
Troposphere |
8km-poles 18km-equator;7 miles thick |
lowest level; contains most clouds |
| 2 |
Stratosphere |
50 km. ; 7-30 miles in air |
contains ozone layer |
| 3 |
Mesophere |
50-90 km. ; 30-55 miles in air |
extremely cold -100 degrees C |
| 4 |
Thermosphere |
90-500 km.; 55-435 mi. |
burning hot due to sun (1475 degrees C) |
| 5 |
Exosphere |
500 km. + ;435 miles in air + |
gases go into space; temperature worthless |
| 6 |
Ionosphere |
48-402 km.; 30-250 mi. |
affects ultraviolet rays ; three regions (D,E, & F regions) |
Atmosphere Composition
| Gas Name |
Percent |
| Nitrogen |
78.10% |
| Oxygen |
20.90% |
| Vapor, other gases |
1% |
| Carbon Dioxide and Argon |
< 1% |
Inner Earth
| Level (crust-core) |
Name |
Material |
Feature |
| 1 |
Crust |
dirt, stones, etc. |
thinest layer |
| 2 |
Mantle |
silicate rock |
largest layer |
| 3 |
Outer Core |
Liquid Iron |
extremely hot |
| 4 |
Inner Core |
solid iron |
similar to other cores |
Layers of the Crust
| atmosphere-core rank |
name |
| 1 |
Continental Crust |
| 2 |
Oceanic Crust |
| Note: |
Mohorovicic Discontinuity boundary lies between Crust and Mantle. |
Layers of the Mantle
| crust-core rank |
Name |
Km |
| 1 |
Upper Mantle |
250 Km-650 Km |
| 2 |
Lower Mantle |
650 Km-2,900 Km |
| Note: |
Core-Mantle Boundary lies between Mantle and Cores |
|
Layers of the Cores
| crust-core rank |
Name |
Km |
| 1 |
Outer Core |
2,900 Km- 5,100 Km |
| 2 |
Inner Core |
5,100 Km-6,370 Km |
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